Photo, 1960 Meeting for the signing of the "Déclaration Constitutive du Nouveau Réalisme" in Yves Klein's studio
Photo, 1959 International collaboration between artists and architects in the realisation of the new Gelsenkirchen Opera House
Document, 1964 Invitation card for the exhibition "Yves Klein Peintures de feu" at the Galerie Schmela, Düsseldorf